He who knows, does not speak. He who speaks, does not know. Laozi
If you can help a person help, if you cannot help - pray, if you do not know how to pray - think about the person in a good way! And this will already be a help, because godly thoughts are also a weapon! Nikolaj Velimirovic
If one does not know to which port one is sailing, no wind is favorable. Seneca
Those who wear pearls do not know how often the shark bites the leg of the diver. African Proverb
What I do not know will not keep me warm. Lower Austria Proverb
A dead man does not know where his grave is. Bantu Proverb